Email Adddress: [email protected]

leaching of copper from tailings using ammonia

leaching of copper from tailings using ammonia

Leaching of copper from tailings using

2010-8-3  Leaching of copper from tailings using ammonia/ammonium chloride solution and its dynamics Abstract: The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammonia/ammonium chloride solutions has been studied. The tailings belong to a low-grade and high-alkaline copper ore.

Get Price

Copper recycle from sulfide tailings using combined ...

2018-7-10  Ammonia leaching from copper sulfide tailings A 30-days ammonia leaching experiments of sulfide tailings with different concentration of ammonia was carried out in a sterile environment. Changes in the key parameters (i.e., pH and Cu extraction rate) during ammonia leaching with increasing concentrations of NH 3 are shown in Fig. 4.

Get Price

Use of Ammonia Salts in Selective Copper

2020-6-3  On the other hand, in the ammonium hydroxide leaching of tailings, it was seen that the solubility of copper decreased slightly by increasing the leaching temperature. This is because the reactant that was used was removed from the solution medium by

Get Price

Recovery of Copper from Ammoniacal Leachates by

2021-4-27  Leaching with ammonia and ammonium salts, also known as ammoniacal leaching, is a hydrometallurgical process to extract copper and zinc very selectively from Cu–Zn–Pb sulfidic tailings, with respect to iron and lead [ 20 ]. Ammonia and ammonium salt mixtures are cheaper, less toxic, and easily regenerated compared to acids [ 21 ].

Get Price

Ammonia Leaching: A New Approach of Copper

2013-12-10  In research conducted for processing of manganese nodules by ammonia leaching [35–37], after reductive roasting of the sample for releasing precious metal oxides from manganese and iron oxide phase, reduction operations were done to form copper, nickel and cobalt metals and facilitate their ammonia leaching. During the ammonia leaching process, in addition to dissolution of precious metals such as copper,

Get Price

Ammonia Leaching in the Copper Industry: A Review

Ammonia leaching was first used for recovery of non-ferrous metals such as copper from oxide ores or ores containing pure copper, but gradually the use of this technology was developed from more...

Get Price

COPPER(II) EXTRACTION FROM AMMONIA LEACH

2013-9-7  Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in ammonia systems as a cationic amminacomplexes. Alkalinity of the solution and free

Get Price

Selective leaching of copper and zinc from primary

2021-2-5  To identify whether other biogenic compounds aside from ammonia were independently influencing copper leaching, leaching experiments were performed using a lixiviant produced after stripping biogenic ammonia from the culture broth post ureolysis (ammonia stripped), or after 48 h of growth on a media comprised solely of 20 g L −1 yeast extract (urea free media). Again, no significant leaching of copper

Get Price

LEACHING OF MALACHITE ORE IN AMMONIUM

In ammonia leaching of oxidized copper ores, as the dissolution reactions happen at mildly acidic or basic conditions, some metal impurities, which pass into the solution during the dissolution of ore, precipitate because of the high pH of the solution. Besides, ammonia forms stable complexes with copper ions, and this can lead to an increase ...

Get Price

Leaching of copper from tailings using

The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammonia/ammonium chloride solutions has been studied. The tailings belong to a low-grade and high-alkaline copper ore. The effect of leaching time, the concentration of ammonia, solid/liquid ratio and temperature were investigated.

Get Price

ammonia-ammonium chloride leach copper minerals

2012-11-6  leaching of copper from tailings using ammonia/ammonium chloride . Leaching of copper from tailings using ammonia/ammonium chloride for leaching of different copper minerals. 13,14 The The Ammonia Leach for Copper »More detailed

Get Price

Copper Leaching from Refractory Flotation Tailings

2018-4-18  Copper Leaching from Refractory Flotation Tailings Xu Bai 1,2, ... Leaching can be divided into two types, namely, acid leaching and ammonia leaching [7,8], named after the leaching agent employed. Acid and ammonia leaching are suitable for treating the copper ... tailings are extracted using concentrated sulfuric acid under high temperature ...

Get Price

Recovery of Copper from E-waste Using Ammonia

As a question, are you aware that copper recovery from e-waste using ammonia leaching was (is?) practiced by Peninsula Copper Inc in Hubble, MI for 20+ years. This plant was the old Calumet and Hecla tailings leach recovery plant started up in 1917 and operated through 1968 at which point it

Get Price

COPPER(II) EXTRACTION FROM AMMONIA LEACH

2013-9-7  Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in ammonia systems as a cationic amminacomplexes. Alkalinity of the solution and free

Get Price

Treatment of copper-rich gold ore by cyanide leaching ...

2015-3-2  leaching, ammonia leaching has the merits of high selectivity over gang minerals, low corrosivity and application in alkaline conditions [8]. MUIR et al [8] demonstrated the removal of copper (up to 95%) from an oxidised tailings via ammonia leaching, which resulted in a substantially reduced reagent consumption (from 30

Get Price

Investigation of Copper Ammonia Leaching from

Although ammonia leaching of copper from slags has been reported generally as a part of copper slag utilization methods, but no detailed studies have been reported in the literature. In this research, we tried to investigate the effect of different parameters on ammonia leaching of copper from copper smelting slag by identifying different copper-bearing phases and following them during ...

Get Price

Experimental Study of the Sulphatizing Roasting of ...

2021-3-1  Yin S, Wang L, Wu A, Kabwe E, Chen X and Yan R 2018 Copper recycle from sulfide tailings using combined leaching of ammonia solution and alkaline bacteria J.

Get Price

Copper Leaching Behavior from Waste Printed Circuit

reported the selective leaching of copper from motor scraps using cupric ammine solutions.1,2) Zhou et al. studied the removal of copper from ferrous scrap by an ammonia leaching method.3,4) In these studies, Cu(I) ions were obtained under an air or oxygen atmosphere as the reaction product, and then metallic copper would be electrowon from

Get Price

LEACHING OF MALACHITE ORE IN AMMONIUM

In ammonia leaching of oxidized copper ores, as the dissolution reactions happen at mildly acidic or basic conditions, some metal impurities, which pass into the solution during the dissolution of ore, precipitate because of the high pH of the solution. Besides, ammonia forms stable complexes with copper ions, and this can lead to an increase ...

Get Price

Recovery of Copper from E-waste Using Ammonia

As a question, are you aware that copper recovery from e-waste using ammonia leaching was (is?) practiced by Peninsula Copper Inc in Hubble, MI for 20+ years. This plant was the old Calumet and Hecla tailings leach recovery plant started up in 1917 and operated through 1968 at which point it

Get Price

COPPER(II) EXTRACTION FROM AMMONIA LEACH

2013-9-7  Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in ammonia systems as a cationic amminacomplexes. Alkalinity of the solution and free

Get Price

Investigation of Copper Ammonia Leaching from

Although ammonia leaching of copper from slags has been reported generally as a part of copper slag utilization methods, but no detailed studies have been reported in the literature. In this research, we tried to investigate the effect of different parameters on ammonia leaching of copper from copper smelting slag by identifying different copper-bearing phases and following them during ...

Get Price

Ammonia Leaching Study on Carbonate Oxidised

The effects of oxidized copper ores which came from Yunnan province were carried out by using ammonialeaching methods in the laboratory.In order to seek the optimum leaching conditions under normal temperature and pressure,we conducted a series of validation experiments. Theoptimum conditions were obtained as follows: ammonia concentration 2.5mol/L, ammonium

Get Price

Experimental Study of the Sulphatizing Roasting of ...

2021-3-1  Yin S, Wang L, Wu A, Kabwe E, Chen X and Yan R 2018 Copper recycle from sulfide tailings using combined leaching of ammonia solution and alkaline bacteria J.

Get Price

Copper Leaching Behavior from Waste Printed Circuit

reported the selective leaching of copper from motor scraps using cupric ammine solutions.1,2) Zhou et al. studied the removal of copper from ferrous scrap by an ammonia leaching method.3,4) In these studies, Cu(I) ions were obtained under an air or oxygen atmosphere as the reaction product, and then metallic copper would be electrowon from

Get Price

LEACHING OF MALACHITE ORE IN AMMONIUM

In ammonia leaching of oxidized copper ores, as the dissolution reactions happen at mildly acidic or basic conditions, some metal impurities, which pass into the solution during the dissolution of ore, precipitate because of the high pH of the solution. Besides, ammonia forms stable complexes with copper ions, and this can lead to an increase ...

Get Price

The selective leaching of copper from a gold–copper ...

2020-12-11  gold leaching either using the same process at elevated temperature (40–60 °C), as patented by the authors, or using a cyanidation process. Copper selective leaching will reduce the gold losses due to a cementa-tion mechanism of gold in the presence of metallic copper as all of the metallic copper will dissolve in the pre-leaching stage.

Get Price

Leaching of Valuable Metals from Roasted Residue of Spent ...

2008-11-5  Roasted residue was also leached with a mixed solution containing ammonia and ammonium sulfate. The results showed that all of lithium could be leached out. Due to the metallic copper in the roasting residue, the leaching rate of copper only reached 92.86% in sulfuric acid solution, but could be up to 97.60% in ammoniacal solution.

Get Price

LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9  The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper leaching was investigated with respect to acid concentration and solid to liquid ratio. The copper concentration in the leach solution ranged from 0.80 to 1.75 g dm-3. The total Cu recovery rate ranged from 30 to 56 %, whereas the

Get Price

Recovery of Copper from E-waste Using Ammonia

As a question, are you aware that copper recovery from e-waste using ammonia leaching was (is?) practiced by Peninsula Copper Inc in Hubble, MI for 20+ years. This plant was the old Calumet and Hecla tailings leach recovery plant started up in 1917 and operated through 1968 at which point it

Get Price

Investigation of Copper Ammonia Leaching from

Although ammonia leaching of copper from slags has been reported generally as a part of copper slag utilization methods, but no detailed studies have been reported in the literature. In this research, we tried to investigate the effect of different parameters on ammonia leaching of copper from copper smelting slag by identifying different copper-bearing phases and following them during ...

Get Price

Ammonia Leaching Study on Carbonate Oxidised

The effects of oxidized copper ores which came from Yunnan province were carried out by using ammonialeaching methods in the laboratory.In order to seek the optimum leaching conditions under normal temperature and pressure,we conducted a series of validation experiments. Theoptimum conditions were obtained as follows: ammonia concentration 2.5mol/L, ammonium

Get Price

Copper Leaching Behavior from Waste Printed Circuit

reported the selective leaching of copper from motor scraps using cupric ammine solutions.1,2) Zhou et al. studied the removal of copper from ferrous scrap by an ammonia leaching method.3,4) In these studies, Cu(I) ions were obtained under an air or oxygen atmosphere as the reaction product, and then metallic copper would be electrowon from

Get Price

The selective leaching of copper from a gold–copper ...

2020-12-11  gold leaching either using the same process at elevated temperature (40–60 °C), as patented by the authors, or using a cyanidation process. Copper selective leaching will reduce the gold losses due to a cementa-tion mechanism of gold in the presence of metallic copper as all of the metallic copper will dissolve in the pre-leaching stage.

Get Price

LEACHING OF LOW-GRADE COPPER ORES: A CASE

2017-6-9  The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper leaching was investigated with respect to acid concentration and solid to liquid ratio. The copper concentration in the leach solution ranged from 0.80 to 1.75 g dm-3. The total Cu recovery rate ranged from 30 to 56 %, whereas the

Get Price

Leaching of Valuable Metals from Roasted Residue of Spent ...

2008-11-5  Roasted residue was also leached with a mixed solution containing ammonia and ammonium sulfate. The results showed that all of lithium could be leached out. Due to the metallic copper in the roasting residue, the leaching rate of copper only reached 92.86% in sulfuric acid solution, but could be up to 97.60% in ammoniacal solution.

Get Price

Leaching of Malachite Ore in NH3-Saturated Water ...

2004-6-24  In this study, the leaching kinetics of malachite [CuCO3Cu(OH)2], an oxidized copper ore, was investigated in water saturated with ammonia gas. In the experiments, the ammonia concentration of the solution, the particle size of the ore, the temperature, the stirring speed, and the solid-to-liquid ratio were chosen as parameters. It was determined that the leaching rate of malachite increased ...

Get Price

Ammonia Gold Dissolution Leaching

2017-12-12  Ammonia Gold Dissolution Leaching. Processes for gold extraction usually depend on how gold is associated with its environment. Although cyanide leaching remains the overwhelming option for the treatment of gold ores, because of its economy and simplicity, it suffers from certain inherent drawbacks such as toxicity, low leaching

Get Price